Hi all! I would like to know if, in the case of a fire hex appear in the player location, that make him dead or injuried?

Reviewing the "Advanced" variant rules and its discussion thread (Advanced Rules, although fire isn't discussed there) it appears that fire is only beneficial: provides a +1 movement the following turn after overnighting in a fire hex, prevents the -1 loss of life level during the "nighttime in the desert" event, and possibly allows +1 food when finding food.